Client-side Wi-Fi heatmap generation

[Hypfer]

The Idea here would be to integrate the Wi-Fi Heatmap functionality of Valeronoi into the Valetudo frontend in a way that does not affect the backend.

First, the user would navigate to a special map view similar to the robot coverage map. There, they'd be shown a warning dialog that this feature may exhaust browser resources, use a lot of ram etc. If the user accepts the warning, the site would then start periodically polling the WifiConfigurationCapability and maybe also even the WifiScanCapability if available. The aggregated data would then be rendered onto the live map as a signal heatmap.

This view would need full live map controls to allow the user to start the Wi-Fi mapping without having to open the Valetudo Webinterface a second time in another tab. Furthermore, it should also feature a data export button so that it can be persisted somewhere to be viewed and processed later. It would likely make sense to use the same data format as Valeronoi does.